MOHAMED, Elwasila S.E. “Bounds Test Cointegration Approach to Examine Factors Contributing to Declining Maternal Mortality Ratio in Sudan (1969-2015)”. Journal of Economics and Political Economy 5, no. 2 (July 18, 2018): 146–159. Accessed November 23, 2024. https://journals.econsciences.com/index.php/JEPE/article/view/1642.